You are simply incorrect in your assumptions and are ignoring very the valid and long standing reasons for why the general public can’t just wander up and demand the private records of other citizens.
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When a man runs for president, his life should be an open book. What he has done in private life shows his character, and his character determines what he will do in the future.
Exactly, and when that open book is closed and locked shut to the point where even his grades are top secret, you don’t have to be a rocket scientist to figure out a lot is being hidden.
“When a man runs for president, his life should be an open book.”
Perhaps. But that is not the way it is.
If you would like it to be so, work to change the laws. But do not expect laws to change after the fact to suit your whims.